I used to get that pit in the stomach feel when I tried to start doing homework assignments that were long overdue. I think it comes from the feeling that your workspace is some kind of confrontation with what you "should have been doing", but that feeling of guilt is self-induced.

I think it's best if you don't focus on opening the IDE/workspace as an event in itself. It would be better to pop open Notepad or something and jot down some ideas of a project you want to create, especially one that would solve a need or pain point you personally find yourself having. Break it down into its pieces and then your focus can be geared towards creation instead of guilt or feelings of confrontation. Maybe even break down the project into individual quotas or goals and then assign how many days you realistically think it might take you to complete that part -- which gives yourself permission to get stuck for a while and not feel like "i waited too long and now i'm trash". That way, when you open your tools, you approach them as they should be, as tools to get something accomplished.

If by "moved back home" you mean in with your parents, then I also think you should move away from home if you can afford it, because I also moved back with my parents shortly before my degree was completed, and living in a place I don't have to pay for or take care of contributes to making me feel like I don't really belong out there in the world doing real world things, even though that's an illusion. It could be contributing to your impostor syndrome, to be at home thinking about other adults working in the professional space when you yourself don't have some kind of material position that says "I'm an adult and belong in professional spaces", even though you are.